is not a chal llenge that can be contained. that's why the united states will do what we must to prevent iran from obtaining a nuclear weapon. >> the president devoted a large portion of his speech to the arab spring and its fallout. just two weeks after the attacks that killed ambassador chris stevens, the president promised even as we will bring the killers to justice, he will not back down from supporting democracy nor from protecting freedom of speech. indeed, the president extended his spirited defense of free expression even to remarks against himself. >> as president of our country and commander in chief of our military, i accept that people are going to call me awful things every day. and i will always defend their right to do so. [ applause ] >> i wonder who he's been talking about there. let's get right to our panel now. in washington dana mill bank, political columnist for "the washington post." in west palm beach, florida, msnbc political analyst professor michael eric dyson who we have persuaded to leave his mojito by the poolside and in washington, political analyst david corn.